$y'+\frac{x}{x^2+1}y=0$
$\sec^3\left(\cot^2+1\right)$
$\int2x\cdot\sqrt{2x-93}$
$\frac{d}{dx}\left(4cos^2x\cdot cos\:y\right)=3y$
$\lim_{x\to0}\left(\frac{tan^{-1}x}{x^2-x}\right)$
$x^2-10+90$
$84.025\cdot6.25$
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